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A Code 61 and a Code 62 connection can both have four bolts and the same nominal port size. Put them side by side, though,

You find “SAE 3000” on one drawing and “Code 61” on another, so it is tempting to enter 3,000 psi as the connection rating and

Your pump gauge may show plenty of pressure, yet a cylinder slows down when the required flow rises. Before you blame the pump, check how

A valve body can meet its outside dimensions and still fail on the test bench. The spool drags in one position, a poppet guide wears

You have a valve torque value of 60 N·m and an actuator rated for 80 N·m. That looks comfortable until you notice that the actuator

A catalog can make throttle valve vs needle valve sound like a choice between two completely different products. In hydraulic work, that is often misleading.

You set the cylinder speed in the morning, and it is wrong again after the oil warms up. Or the actuator runs smoothly with no

A 1/2-inch hydraulic valve is not automatically right for a 1/2-inch hose. The connection may fit while the internal bore is too small, the pressure

Turn the handle a quarter turn and the machine either has flow or it does not. That is the short answer to how does a

A valve can survive a pressure hold and still give you cylinder drift, excessive heat, or unreliable motion in the machine. That is because a

When your cylinder slows down, the load starts drifting, or one line runs unusually hot, it is tempting to blame the valve first. Sometimes that

When you see a restriction symbol with a diagonal arrow, you already know the circuit is trying to control flow through an adjustable opening. Add